We bought this set for our 7 year old son last year. He used it for a few months and has moved on with his life. The set is in perfect working order - it's built (so you can test all of the features, etc.) and includes the two cars that came with the set.
This sells for $115 (plus tax) at Walmart: https://www.walmart.com/ip/Hot-Wheels-City-Ultimate-Garage-Playset-with-2-Die-Cast-Cars-Toy-Storage-for-50-Cars-for-Kids-Age-4-8/ show contact info
Here's some language from the Walmart product page:
With the multi-level Hot Wheels City Ultimate Garage, kids can race, stunt and battle a dragon just like in the Netflix series 'Let's Race'
The first floor features cool track-play details like moveable hoses, a car wash with a foam roller, diverters and connectors to connect to other sets as part of a larger Hot Wheels City. (Additional sets sold separately.)
Take the two-car elevator to the next level where kids can launch the 2 included Hot Wheels cars straight from the elevator into a side-by-side race
On the third level, launch into a side-by-side loop stunt, adjusting the diverters to change the cars' final destinations
A car-hungry dragon awaits on the 4th level, and kids launch their Hot Wheels to defeat it or else get eaten. Eaten cars get 'pooped' out, while the defeated dragon plummets to the bottom of the garage
Take advantage of the more than 50 parking spots for easy and convenient Hot Wheels storage
The Hot Wheels City Ultimate Garage includes 2 Hot Wheels vehicles, making this a great gift for kids 5 years old and up